APD
APD is an abbreviation for:
- Outpatient care service , more common generic term for commercial providers, see social station
- Anterior-posterior diameter, a prenatal diagnostic measurement, see Abdominal Transverse Diameter
- Workers-Workers Party Germany (also Workers' Party Germany), a small German party that is only active in Mecklenburg-Western Pomerania
- Autistic Pride Day , a holiday for autistic people
- Motorists and Citizens' Interest Party of Germany , a former small German party
- Avalanche photodiodes , highly sensitive and fast photodiodes and count among the avalanche diodes
- Sudanese Arabic , an Arabic dialect that is spoken in Sudan and South Sudan and is very similar to the dialects of Upper Egypt, but also of the Hejaz, language code according to ISO 639-3
- Weimarer Land district (for Apolda ), license plate number